I have quoted this example many times but the reply from the people is always that it is just one case of Prophet saw after that the Imamat continued from the Imams A.S. and not their wives.
More over how can i relate this to myself for example I am the daughter of my father and mother so i am the progeny of whom?

Yes generally it's from father side but not always
Yes you are progeny of your father but your children will be in the progeny of your father as imam Hasan as and Imam Husain as are through Bibi Fatima as